ccie prerequisites

Prerequisites for successful VOD systems and servers: 1. The network system should be designed so as to avoid network traffic congestion. 2. High-performance switches are tightly integrated with servers, storage systems, backup systems, software, system settings, and client settings. 3. There is a need to continuously monitor and debug the network environment, the use of the network, the throughput of devices and servers on the network. 4. Operate

client request is received on a specific IP address/port combination and the IP address is not configured to listen on that particular port, IIS returns a 404.1 HTTP error. For example, if a computer has two IP addresses and only one of the IP addresses is configured to listen on port 80, any requests received from port 80 by another IP address will cause IIS to return 404.1 errors. This error should only be set at this service level because it is returned to the client only when multiple IP ad

" : "zhangsan" }{ "_id" : ObjectId("5b4eb96759122739e2695614"), "id" : 2, "name" : "lisi" }mongos> db.test.remove({"id":1}) #删除test集合中的id为1的数据WriteResult({ "nRemoved" : 1 })mongos> db.test.find(){ "_id" : ObjectId("5b4eb96759122739e2695614"), "id" : 2, "name" : "lisi" }mongos> db.test.update({"id":2},{$set:{"name":"wangwu"}}) #修改数据WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })mongos> db.test.find(){ "_id" : ObjectId("5b4eb96759122739e2695614"), "id" : 2, "name" : "wa

, to see the status of a process. pid of the kill-9 process : Kill Process (-9 indicates forced termination.) Use PS to find the process, and then kill it with kill network communication command: View current system NIC information: Ifconfig View connection to a machine: pin G To view the port usage for the current system: Netstat-an shutdown : shutdown-h now : Specify to shut down now immediately; shutdown +5 "System will shutdown after

Label:The prerequisites are:Please check with the application developer and OPS staff for confirmation:First: Whether the Windows Database server has an application that has fetching (or extracting data). If so, the application software that needs to ask for a number (or extract data) has a corresponding version in Linux.Second: The window database server hardware interface (USB, the port and so on) whether the dongle or the like. If there is, you nee

master values (Master_seq.nextval, ' John Doe ')--View the current and next values of the sequenceSelect Master_seq.currval from dualSelect Master_seq.nextval from dual--Add comments to the master tableComment on table master is ' pet 'Comment on column master.id is ' master ID ' 、、、、、、、、、、、、、、、、、、、 add constraints to the table 、、、、、、、、、、、、、、、 There are several major categories of Oracle-built constraints:Nn:not NULL non-null constraintUk:unique KEY UNIQUE ConstraintPk:primary Key PRIMARY KEY

Brief introduction Running a build process based on a defined event, such as a nightly build or on-demand build, is a practice of software development. In a large software build, it may take hours or even days to complete the build. Construction often fails. This is a huge waste of lean management. This is particularly true when running this build in the cloud infrastructure, which calculates costs based on CPU usage in the cloud infrastructure. Running a prerequisite can reduce the risk of a

to create an environment variable named "Classpath" with a value of ".", a point in English that represents the current path.Environment variables:Java_home:d:\java\jdk1.8.0_25CLASSPATH:.; %java_home%\lib;%java_home%\lib\dt.jar;%java_home%\lib\tools.jar;Path:;%java_home%\bin;%java_home%\jre\binVerify that the configuration is successfulClick Win key to run (or use win+r) Input cmd command Input Java-versionThen, in console input, displaying the version information appears to repres

Download Laravel FrameworkComposer Create-project Laravel/laravel project name Version nameExample: Composer Create-project Laravel/laravel HomeNet 5.0Create a project named HomeNet, the Laravel framework version is 5.0Composer Create-project Laravel/laravel--prefer-distLatest VersionNginx/usr/local/nginx/conf/vhost Add conf fileAdd a method: Under any directory, add conf file (Root permission) Lnmp vhost addFor example, add a domain name of test.comModify configuration file VI test.com.confModi

Maps, Opensnoop for Linux,execsnoop for Linux, Tcpretrans, Page Cache hit Ratio (2014). Posts about perf-based Perf-tools:perf Hacktogram. Posts about Perf_events:perf CPUs sampling, perf Static tracepoints, perf Heat Maps, perf counting, perf Kernel line Traci Ng, perf off-cpu time Flame Graphs, Linux Profiling at Netflix (2014-5). The blog post strace Wow Much Syscall discusses strace (1) for production use, and compares it to advanced tracing tools (2 014). Use Method:linux perfo

different complex algorithms and code optimization, to achieve the readability of the code.10. Find a few friends to talk about a different way of achieving the need to see who has the best opinion in this respect.Here are some specific points of knowledge that a person can understand about C/O:1. Choose a development platform that you can understand.2. Use English;3. Learn how to use printf, and note that the parameters are separated by commas (at least a Hello world is written);4. Use%d to pr

Configuration tool.The appropriate configuration for Samba is done through the graphical interface:1) Add user2) set up the Linux shared directory and its permissions3. Test use1) If a Windows host wants to access Ubuntu's shared directory, the network of both systems must be able to be flat, otherwise, inaccessible, for Ubuntu to flat Windows IP:2) Get the Ubuntu IP, knocking at the terminal: Ifconfig.3) access to the Samba shared directory, operating in the Windows Host: Start-up and run-->\\

. The difference between a thread and a process: Dispatch: A thread acts as the basic unit of dispatch and allocation, and processes as the basic unit of resources. Concurrency: Not only can concurrent execution between processes, but also concurrent execution between multiple threads of the same process. Owning a resource: a process is an independent unit that owns resources, and threads do not own system resources, but can access resources that belong to the process.

Have heard many webmaster complained that they have submitted the site to a number of Web site directory, but there are few, as for why they can not say clearly, in fact, this problem is a lot of webmaster will encounter, not every one of us to submit a directory site will be included, and no matter to which platform can publish their own site links , these must be fastidious, otherwise the network promotion is not messed up. Below to push the network to talk with you about the site Directory of

", "username", "password") or Die ("Cannot connect to MySQLServer"); $query = " SELECT * from MyTable "; $result = Mysql_db_query (" MyDatabase ", $query); mysql_close (); Description: To make the code clear, it is not recommended to use this function call 7, Mysql_ Result ()-Gets and displays data format: Mixed mysql_result (Resource result_set, int row [, mixed field]) Example: $query = "SELECT ID, name from Mytab Le order by name ", $result = mysql_query ($query); for ($count =0; $count Chang

Workaround:1. At the command prompt, net share c$=c:Add:If this command prompts the error: "System error 5, Access denied," We can modify the registry, check the AutoShareServer and AutoShareWks registry values to ensure that they are not set to 0, and let the C drive share.Steps:1. Tap start → run, enter regedit, and press ENTER to enter the Registry Editor.2. Locate and click Hkey_local_machine-->system-->currentcontrolset-->services-->lanmanserver-->parameters, Change the value of AutoShareSe

Tags: selected round post back SEL bracket Code Auto MarkdownSeveral times recently left the seat that I had been sitting in, went to another computer room examination.Then suddenly remembered to remember the simple configuration of Emacs.The Noip of the remnants of the memory to pick up a little more ...Attach some explanations(global-set-key [f9] ‘compile-file);;一键编译（弄Devcpp留下来的习惯）(global-set-key (kbd "C-z") ‘undo);;一键撤销（Like Windows）(global-set-key (kbd "C-q") ‘kill-this-buffer);;一键关闭;;（蒟蒻总是搞

addition of an element to the list, the ID exists to update the specified element*/Province="Luanxian", City="111 Hunan Occupation Master", District="Community", Seconds=1}, Addlist=NewList() { NewAddress {/*no ID (or ID not present in the collection) is the addition of an element to the list, the ID exists to update the specified element*/Id="556d531e2683c818c86cadde", Province="Luanxian", City="Hunan occupies master ddd", District="Community", Seconds=1

 I. Definition of redistribution Route redistribution refers to the ability of border routers linked to different routing selection domains to exchange and advertise route selection information between different Autonomous Systems. 650) this. width =

Optional delivery-BGP Communities is a marker for routing entries to ensure continuity of routing filtering and selection-BGP routers can community the routing entries when redistribution, sending, and receiving routing updates (ROUTE-MAP)-Depending